A laptop lasts for years, so do not rush. First decide how you will use it: study, office work, or video editing and gaming.
What to check:
1. Processor and RAM: for everyday work 8 GB RAM is now seen as a minimum, and heavy work needs more.
2. Storage: a laptop with an SSD feels quick and starts fast. Avoid models with only an old hard disk.
3. Screen: check size, brightness and resolution. If you will look at it for hours, choose a screen that is easy on the eyes.
4. Battery: the hours the company claims can differ from real use. Read user reviews.
5. Weight and build: if you carry it daily, pick a lighter model.
6. Warranty and service: ask whether there is a service centre in your city.
Do not buy only on price or brand name. Spend on what matters for your work.